Create remove-9.cpp

Author: kamyu104

C++/remove-9.cpp

@@ -0,0 +1,15 @@
+// Time:  O(logn)
+// Space: O(1)
+
+class Solution {
+public:
+    int newInteger(int n) {
+        int result = 0, base = 1;
+        while (n > 0) {
+            result += (n % 9) * base;
+            n /= 9;
+            base *= 10;
+        }
+        return result;
+    }
+};